diff --git a/documentcloud/addons/views.py b/documentcloud/addons/views.py
index 5639626c..acd03fd0 100644
--- a/documentcloud/addons/views.py
+++ b/documentcloud/addons/views.py
@@ -742,7 +742,7 @@ class Filter(django_filters.FilterSet):
         dismissed = django_filters.BooleanFilter(help_text="Was this run dismissed?")
         site = django_filters.CharFilter(
             field_name="event__parameters__site",
-            lookup_expr="exact",
+            lookup_expr="iexact",
             label="Site",
             help_text="Filter runs by the `site` value in the event's parameters.",
         )
@@ -984,7 +984,7 @@ class Filter(django_filters.FilterSet):
         )
         site = django_filters.CharFilter(
             field_name="parameters__site",
-            lookup_expr="exact",
+            lookup_expr="iexact",
             label="Site",
             help_text="Filter events by the `site` value in their parameters.",
         )